Wren False Bottom Sleeping Bag – Fetal Position


False bottom sleeping bag. No drafts. Light weight.

See home page for the made-to-order lead time.

Titanium Grey
Moroccan Blue
Dark Olive
Brick Red
Coyote Brown
Charcoal Grey
Deep Purple
Forest Green
Moss Green
False Bottom Sleeping Bags can be built with a 3/4 length zipper along the left edge of the false bottom. The pad strap can remain attached around the pad keeping the false bottom in place, but the edge of the bag can be unzipped. The zipper is a durable #3 molded tooth zipper with a single slider tab to the inside. None to the outside. This option adds approximately .75oz to the finish weight.
No Zipper
Zipper (+$60.00)
If you want to custom fine tune your fit, select the options above that are closest to, but larger than the dimensions you want. Then write in the dimensions you would like here. If you are looking for a dimension larger than what is available here, simply select the largest (additional charges may apply). Most sizing can be accommodated, within reason.
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This is the Fetal Position version of the Wren False Bottom Sleeping Bag. It has a huge differential cut to prevent the down from being compressed when the sleeper is curled up inside.

The Wren Sleeping Bag is a full sleeping bag with a false bottom. This is a full sleeping bag that wraps all the way around the sleeper, just without the insulation in the bottom where it is compressed and has limited effectiveness in a traditional bag. 12″ of the total torso circumference is the false bottom. This design pushes weight savings well below traditional bags and even below quilts, but performs totally draft free like a full sleeping bag. Venting is accomplished with the top drawcord. It has horizontal baffles, a very large differential cut so you can’t compress the down fill in fetal position, a puffy draft collar, and super dense 160% overstuffed chambers. It is important with any sleep system that it is paired with a sleeping pad rated to similar temperatures. It is especially important with quilts and false bottom bags and it should be noted that pads that utilize empty spaces are generally not suitable for these types of sleep systems.

See https://timmermade.com/sizing/sizing-sleep-systems/ for information on sizing.

This should be used with a Waterbear Balaclava or it can be used with other types of head insulation. https://timmermade.com/product-category/sleep-systems/balaclavas/

This can be paired with an overbag to manage moisture and boost it’s temperature rating. https://timmermade.com/product-category/sleep-systems/overbags/

See the “Technology” section on this site for information about this system’s features.

Weight N/A
Dimensions N/A
Temperature Rating (Fahrenheit)

40, 30, 20

Length (inches) - Top drawcord to foot end

66, 72, 78

Width (inches) - Top/Torso/Knee/Foot

45/64/36/36, 50/66/38/38, 55/68/40/40, 58/70/40/40


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